--- OLD/xc/programs/xlsfonts/xlsfonts.c	Thu Jan  1 00:00:00 1970
+++ NEW/xc/programs/xlsfonts/xlsfonts.c	Thu Jan  1 00:00:00 1970
@@ -25,6 +25,7 @@
 #include <X11/Xutil.h>
 #include <X11/Xos.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include "dsimple.h"
 
 #define N_START 1000  /* Maximum # of fonts to start with */